Sensors 2013, 13(4), 4146-4156; doi:10.3390/s130404146
Article

A Two-Dimensional Laser Scanning Mirror Using Motion-Decoupling Electromagnetic Actuators

1, 2 and 1,* email
Received: 21 January 2013; in revised form: 28 January 2013 / Accepted: 18 March 2013 / Published: 27 March 2013
(This article belongs to the Special Issue Laser Sensing and Imaging)
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Abstract: This work proposes a two-dimensional (2-D) laser scanning mirror with a novel actuating structure composed of one magnet and two coils. The mirror-actuating device generates decoupled scanning motions about two orthogonal axes by combining two electromagnetic actuators of the conventional moving-coil and the moving-magnet types. We implement a finite element analysis to calculate magnetic flux in the electromagnetic system and experiments using a prototype with the overall size of 22 mm (W) × 20 mm (D) × 15 mm (H) for the mirror size of 8 mm × 8 mm. The upper moving-coil type actuator to rotate only the mirror part has the optical reflection angle of 15.7° at 10 Hz, 90° at the resonance frequency of 60 Hz at ±3 V (±70 mA) and the bandwidth of 91 Hz. The lower moving-magnet type actuator has the optical reflection angle of 16.20° at 10 Hz and 50° at the resonance frequency of 60 Hz at ±5 V (±34 mA) and the bandwidth of 88 Hz. The proposed compact and simple 2-D scanning mirror has advantages of large 2-D angular deflections, wide frequency bandwidth and low manufacturing cost.
Keywords: laser scanning mirror; electromagnetic actuator; optical scanning; two-dimensional scanner
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Shin, B.H.; Oh, D.; Lee, S.-Y. A Two-Dimensional Laser Scanning Mirror Using Motion-Decoupling Electromagnetic Actuators. Sensors 2013, 13, 4146-4156.

AMA Style

Shin BH, Oh D, Lee S-Y. A Two-Dimensional Laser Scanning Mirror Using Motion-Decoupling Electromagnetic Actuators. Sensors. 2013; 13(4):4146-4156.

Chicago/Turabian Style

Shin, Bu H.; Oh, Dongho; Lee, Seung-Yop. 2013. "A Two-Dimensional Laser Scanning Mirror Using Motion-Decoupling Electromagnetic Actuators." Sensors 13, no. 4: 4146-4156.


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